/**
 * Copyright (C) 2022-2023 Timber Chain Cloud (TimberCLD). All Rights Reserved.
 *
 * @author TimberCLD
 * @email account@timbercld.com
 * @site https://www.timbercld.com/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
* Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.timbercld.core.utils;

import com.timbercld.core.constant.Constant;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletRequest;

/**
 * IP地址
 * 
 * 
 */
public class IpUtils {
	private static Logger logger = LoggerFactory.getLogger(IpUtils.class);
	public static String getIpAddr(HttpServletRequest request) {

    	String ip = null;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (StringUtils.isEmpty(ip) || Constant.UNKNOWN.equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || ip.length() == 0 || Constant.UNKNOWN.equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || Constant.UNKNOWN.equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isEmpty(ip) || Constant.UNKNOWN.equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || Constant.UNKNOWN.equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
            if (StringUtils.isEmpty(ip) || Constant.UNKNOWN.equalsIgnoreCase(ip)) {
                ip = request.getHeader("X-Real-IP");
            }
        } catch (Exception e) {
        	logger.error("IPUtils ERROR ", e);
        }
        
        return ip;
    }
	
}
